/*-
 * Copyright (c) 2009 Jonathan Anderson
 * All rights reserved.
 *
 * WARNING: THIS IS EXPERIMENTAL SECURITY SOFTWARE THAT MUST NOT BE RELIED
 * ON IN PRODUCTION SYSTEMS.  IT WILL BREAK YOUR SOFTWARE IN NEW AND
 * UNEXPECTED WAYS.
 * 
 * This software was developed at the University of Cambridge Computer
 * Laboratory with support from a grant from Google, Inc. 
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <QString>
#include <iostream>
#include "File.h"
using namespace std;


File::File(QString filename, int fd, cap_rights_t rights)
{
	_name = filename;
	_fd = fd;
	_rights = rights;
	_token = Crypto::instance().generateToken(fd, _name);

	_refcount = new int[1];
	*_refcount = 1;
}


File::File(const File& orig)
{
	*this = orig;
}


File& File::operator = (const File& orig)
{
	_fd         = orig._fd;
	_rights     = orig._rights;
	_name       = orig._name;
	_token      = orig._token;

	_refcount   = orig._refcount;
	(*_refcount)++;

	return *this;
}


File::~File()
{
	(*_refcount)--;
	if(*_refcount == 0) close(_fd);
}


bool File::operator == (const File& other)
{
	return ((_fd == other._fd) && (_rights == other._rights));
}


QString File::capstring() const
{
	if(!isValid()) return "";

	QString result = "/cap/";
	result += QString(_token.ciphertext.toBase64()).replace('/', '-');
	result += "/";
	result += QString(_token.mac.toBase64()).replace('/', '-');
	result += "/";
	result += safeName();

	return result;
}


bool          File::isValid()  const   { return ((_fd > 0) && (*_refcount > 0)); }
int           File::fd()       const   { return isValid() ? _fd : -1; }
cap_rights_t  File::rights()   const   { return isValid() ? _rights : 0; }
QString       File::filename() const   { return isValid() ? _name : ""; }
QString       File::safeName() const
{
	size_t lastSlash = _name.lastIndexOf('/');

	if(lastSlash == -1) return _name;
	else return _name.mid(lastSlash);
}


//File upgrade() const;

void          File::setName(QString name) { _name = name; }

